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Electrode apparatus for preventing cracking of the electrode and insulating layers

a biocompatible electrode and electrode technology, applied in the field of electrode apparatus for preventing cracking of the electrode and the insulating layer, can solve problems such as leakage of electricity, and achieve the effects of convenient control of thickness, convenient elongation, and correct drawing

Inactive Publication Date: 2006-02-28
HISAMITSU PHARM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a technique for preventing cracking and blocking in an electrode apparatus. The invention uses a resin composition that includes a low Tg resin and a high Tg resin, which results in a flexible electrically insulating layer that can prevent cracking and blocking. The invention also provides a base film that can be easily bent and retained in its position, as well as a method for laminating the base film and metal film to ensure proper contact with the skin during use. The use of the resin composition and the design of the base film and bending part improve the performance and reliability of the electrode apparatus.

Problems solved by technology

A serious technical problem involved in the electrode apparatus having a bending part of the type mentioned above is to effectively prevent the occurrence of cracking of the electrode layer and the electrically insulating layer which readily occurs in the vicinity of the bending part.
Cracking of the electrode layer is liable to cause an electric cut-off, and cracking of the electrically insulating layer is liable to expose the electrode layer, thus resulting in leakage of electricity.

Method used

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  • Electrode apparatus for preventing cracking of the electrode and insulating layers
  • Electrode apparatus for preventing cracking of the electrode and insulating layers
  • Electrode apparatus for preventing cracking of the electrode and insulating layers

Examples

Experimental program
Comparison scheme
Effect test

second experimental example

[0022]In order to more firmly make sure of the result of the first experimental test, the same experiment as in the first experimental example using polyester-series resin (merchandise name: ELITEL UE-3223, manufactured by Unitika K. K.) having a glass transition temperature of 1 degree C. as a low Tg resin, and further using the same polyester-series resin (merchandise name: ELITEL UE-9800, manufactured by Unitika K. K.) having a glass transition temperature of 85 degrees C. as in the first experimental example as a high Tg resin. Table 2 shows the result of the second experimental example.

[0023]

TABLE 2Con-Con-TgTgjugatejugateFine85 de-1 de-AngleAngleBlock-crack-grees C.gree C.230° C.250°ingingSample 8 100 parts  0 parts10 / 10 10 / 10 NoXSample 9 80 parts20 parts10 / 10 10 / 10 NoXSample 1060 parts40 parts0 / 100 / 10NoΔSample 1150 parts50 parts0 / 100 / 10No◯Sample 1240 parts60 parts0 / 100 / 10Yes◯Sample 1320 parts80 parts0 / 100 / 10Yes◯Sample 14 0 parts100 parts 0 / 100 / 10Yes◯(Occurrence number of crac...

third experimental example

[0025]So, investigation was further continued as to what kind of adverse effects are prevailed on cracking or blocking of the electrically insulating layer 30 by changing the glass transition temperature. The results are shown in Tables 3 and 4.

[0026]

TABLE 3ConjugateConjugateResin TgAngle 230°Angle 250°BlockingSample 15Tg 85 degrees C.6 / 1010 / 10NoSample 16Tg 67 degrees C.4 / 1010 / 10No

[0027]

TABLE 4Low Tg resin−29−201High Tg resin40XX◯67ΔΔ◯85◯◯◯◯: No blocking has occurredΔ: Blocking has slightly occurredX: Blocking has occurred

[0028]From the result of Table 3 regarding the resins having the glass transition temperatures of 85 degrees C. and 67 degrees C., it is known that the two resins are effective in preventing the occurrence of blocking but the resin having the lower glass transition temperature of 67 degrees C. than the resin having the higher glass transition temperature of 85 degrees C. seems to be more effective for the purpose of prevention of the occurrence of cracking of the e...

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Abstract

It is an object of the invention to prevent not only cracking but also blocking of an electrode layer 20 and an electrically insulating layer 30, particularly the electrically insulating layer 30, which is formed on a base film 10. An electrode apparatus comprises a base film 10 for defining a recess 50 at the inner periphery of a bending part 500, and an electrode layer 20 and an electrically insulating layer 30 which are pattern formed on the base film 10. The electrode layer 20 crosses the bending part 500 from the inside of the recess 50 to the outside. The electrically insulating layer 30 covers the upper part of the electrode layer 20 in the vicinity of the bending part 500. A resin composition obtained by admixing a low Tg resin having a glass transition temperature equal to 25 degrees C. or lower and a high Tg resin having a higher glass transition temperature (for example, 40 degrees C. or higher) than that of the low Tg resin is used as a dielectric of the electrically insulating layer 30.

Description

[0001]This application claims priority benefits from Japanese Patent Application No. 2002-249858 filed Aug. 29, 2002.FIELD OF THE INVENTION[0002]This invention relates to an electrode apparatus for biocompatible electrode apparatus which can be used in the medical field such as treatment and diagnosis of illness, and more particularly to an electrode apparatus which can prevent the occurrence of cracking of an electrode layer and an electrically insulating layer which are elements composing the electrode apparatus.BACKGROUND OF THE INVENTION[0003]The iontophoresis (Acta Dermatol venereol, vol. 64, p. 93, 1984) and the electropolation (National Patent Publication No. H03-502416, Proc. Acad. Sci. USA, vol. 90, p. 10504 through 10508, 1993) teach a treatment method in which chemicals and physiologically active substance are introduced into a living body from the skin and the mucous membrane by using electric energy. There is also known a method, in which a substance to be diagnosed is ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H01J1/00A61B5/0408A61N1/04A61N1/30
CPCA61N1/0492A61N1/0428A61N1/0448
Inventor OGAWA, TATSUYATAKAHASHI, SAORIFUCHITA, YASUSHIMORI, KENJIHIGO, NARUHITO
Owner HISAMITSU PHARM CO INC
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